Process and apparatus for spinning rubber thread from rubber latex



' May 7, 1940. T. INOKUCH] ET AL PROCESS AND APPARATUS FOR SPINNING RUBBER THREAD FROM RUBBER LATEX Filed Aug. 7, 19:7

' INVENTORS. f/nofiwko' u. 1 am BY A TTORNEY].

. their difl'erence in the specific gravity and then Patented May 7, 1940 I PROCESS AND APPARATUS FOR SPINNING RUBBER THREAD FROM RUBBER LATEX Toyohachiro Inokuchl, Toshima-ku, Tokyo, and Uichi Kawarahata, Kawagoye, Japan, 'asslgnors to Toyo Gomu Kagakukogyo Kabushiki Kalsha, Tokyo, Japan, a corporation of Japan Application August 7, 1937, Serial No. 157,968 In Japan September 12, 1936 1 Claim. (Cl. 18-54 The present invention relates to a process and the center of the outer tube I from above. Said apparatus for manufacturing rubber thread from outer tube 1 is connected with the second corubber latex by utilizing two kinds of coagulating agulating bath l4 filled with the second coagulatbaths having difierent specific gravities such as ing liquor, namely, concentrated solution of alcohol and calcium chloride solution, which concalcium chloride by means of an overflow pipe sists in inserting the first coagulating tube to be l3 having an overflow brim 9 for maintaining filled with alcohol deep into the outer tube said liquor at a certain level and also keeping provided at the center therein with an overflow it from disturbance.v The lower portion of the pipe adapted for always maintaining calcium outer tube is closed tightly and the narrow lower chloride solution at a certain level and also keepend 15 of the first coagulating tube 4 is buried ing it from disturbance, the head of said 00- in the expanded part of the overflow edge 9. agulating tube being buried in the overflow pipe; The outer tube is provided with an inlet pipe and attaching a spinning nozzle, which has a Ill which is situated at a position lower than the mouth gradually enlarged towards the end, to overflow brim 9 and is connected with the second the upper portion of said first coagulating tube, coagulating bath l4 through a pump. while the second coagulating bath filled with The second coagulating liquor consisting of calcium choloride solution is connected with the concentrated solution of calcium chloride filled outer tube by a conduit, so that the calcium in the second coagulating bath l4 enters the chloride solution in the outer tube returns to the outer tube 1 through the inlet pipe Ill, and mainsecond coagulating bath through the regulating tained at a certain level by the overflow brim 9, overflow pipe and in this way is circulated o flows again into the bath l4 through the outlet pipe 13, thus making a circulating movement.

tinuously. The object thereof is to manufacture rubber thread of excellent quality from The first coagula ng tube 4 is filled with the first rubber latex, preventing the loss of alcohol due coagula liquor consisting e y of alcohol to volatilization and removing the fear of the which forms a boundary w the Second liquor mouth of the spinning nozzle being blocked by near the lower narrow endv l5 of the tube. 'As the coagulation of rubber latex. the boundary 8 is included in the overflow pipe, According to the present invention, two liquid it is p in a Certain Still condition, being layers are formed of the first coagulating liquor n ith r v d r a The fi a u atin consisting largely of alcohol and the second coliquor is replenished y a 000k agualting liquor consisting of concentrated cal- T0 e p the spinning of u ber thread with cium chloride by utilizing their difference in the this apparatuathe first coagu g action is specific gravity. Then, ammoniacal rubber latex d e by jetting ammoniacal ubber latex into the first coagulating liquor from the nozzle I is jetted into coagulating liquor consisting of such two liquid layers, so that i th first, and allowing the same to flow down automaticalagulating liquor the rubber latex flows down y through it by the difference in the p fi automatically into the second liquor owing to y- Next, the Second at g act on is obtained by allowing the above liquor to enter the second coagulating liquor from the boundary 8 of the two liquors and then to flow into the bath l4 together with it. Thus, completing the is admitted into the second coagulating bath, thus coagulating the flowing down rubber latex in two steps with the first and second coagulating liquors and giving it a thread shape.

Referring to the accompanying drawing,

Figure 1 is a section of the spinning apparatus according to this invention and Figure 2, a schematic view showing diagrammatically the whole apparatus for manufacturing rubber thread from rubber latex by utilizing this apparatus.

To the upper end of this apparatus is secured tightly a nozzle l which has a conical mouth 2 enlarged gradually towards the jetting end. The apparatus is also provided with the first coagulating liquor or alcohol feed pipe 5, and the first coagulating tube 4 is inserted deep into rubber thread is produced. The jet 2 is kept from being blocked with the coagulating rubber latex by being enlarged gradually towards the end.

The first coagulating tube 4 has a narrow mouth Bat its lower end to prevent the swirling to be caused by the liquid current and the inlet pipe III is disposed at a position lower than the overflow brim 9 so that the second coagulating liquor introduced from the inlet pipe may stay at the bottom of the outer tube 1 for a little while. Then, the liquor flows out into the outlet pipe I! from said overflow brim 9. Thus, by

coagulation by the second coagulating bath, the

enters the spinning apparatus of this invention. The consumed first coagulating liquor is supplied from a tank D by regulating the quantity with a cock E, and while circulating the second coagulating liquor in a tank H, the abovementioned spinning operation is effected. The thus-produced rubber thread receives the water jetted from a spraying pipe I during its passage through a semi-circular glass bridge J and then is conducted into a washing tank K, where it is mounted upon a number of rollers M and during its travel is washed with the water from a shower bath L and re-enters the tank K. Next, it is delivered to the rollers 0 provided at the upper portion of a washer P and washed perfectly with the fresh water sprayed from a pipe N above the washer. Then, it is made to take a zigzag course by a number of rollers Q and while passing through them is dried with a steam heater R. and reeled round a drum S in a the liquor is slight. Thus, it is possible to manufacture long rubber thread at a small cost by simple operation.

Further, in this invention, rubber thread is firstly jetted into alcohol having light specific gravity and receives the first coagulating action. The thus-produced rubber thread in a semifluid condition sinks slowly into the alcohol layer by its own weight and while being caused to travel by a current of calcium chloride solution, is coagulated completely. Therefore, the spinning operation is carried out very smoothly and consequently there is no apprehension of the'spun thread being broken or becoming nonuniform. Especially, as the nozzle. for jetting rubber latex is dipped in alcohol, there is no disadvantage of the jetting mouth being blocked by coagulated rubber.

We claim:

Process of spinning rubber thread from rubber latex, comprising using two kinds of coagulating liquors, namely alcohol and calcium chloride solution; forming two liquid layers by floating alcohol on calcium chloride solution, allowing only the lower layer calcium chloride solution to flow continuously in a certain direction; and

flrstly coagulating rubber latex by jetting it into alcohol; and then while being caused to travel by a current of the flowing calcium chloride solution, coagulating it completely.

TOYOHACI-HRO INOKUCHI. UICI-lI KAWARAHATA. 

